Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a side elevational view of the opposite side of FIG. 3;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a vacuum cleaner, as shown and described. 